28065621266 has 32 divisors (see below), whose sum is σ = 45624010752. Its totient is φ = 12897722880.

The previous prime is 28065621263. The next prime is 28065621277. The reversal of 28065621266 is 66212656082.

It is not an unprimeable number, because it can be changed into a prime (28065621263) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 711071 + ... + 749501.

It is an arithmetic number, because the mean of its divisors is an integer number (1425750336).

Almost surely, 2^28065621266 is an apocalyptic number.

28065621266 is a deficient number, since it is larger than the sum of its proper divisors (17558389486).

28065621266 is a wasteful number, since it uses less digits than its factorization.

28065621266 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38954.

The product of its (nonzero) digits is 414720, while the sum is 44.

The spelling of 28065621266 in words is "twenty-eight billion, sixty-five million, six hundred twenty-one thousand, two hundred sixty-six".